X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambda_delta%2Fbasic_2%2Fgrammar%2Fitem.ma;h=323f22f882830ba1658eeea355aa1dfb8fc72ae3;hb=cc21d0caa6229b7d1a905f9b62de2af4f40cc863;hp=deeaf047f55dff9c7215f0b5a58707570611a6b6;hpb=a8c166f1e1baeeae04553058bd179420ada8bbe7;p=helm.git

diff --git a/matita/matita/contribs/lambda_delta/basic_2/grammar/item.ma b/matita/matita/contribs/lambda_delta/basic_2/grammar/item.ma
index deeaf047f..323f22f88 100644
--- a/matita/matita/contribs/lambda_delta/basic_2/grammar/item.ma
+++ b/matita/matita/contribs/lambda_delta/basic_2/grammar/item.ma
@@ -38,14 +38,10 @@ inductive flat2: Type[0] ≝
 
 (* binary items *)
 inductive item2: Type[0] ≝
-  | Bind2: bind2 → item2 (* binding item *)
-  | Flat2: flat2 → item2 (* non-binding item *)
+  | Bind2: bool → bind2 → item2 (* polarized binding item *)
+  | Flat2: flat2 → item2        (* non-binding item *)
 .
 
-coercion Bind2.
-
-coercion Flat2.
-
 (* Basic properties *********************************************************)
 
 axiom item0_eq_dec: ∀I1,I2:item0. Decidable (I1 = I2).